Rotating Accuracy Measurement System of Spindle Based on Three Point Method

2013 ◽  
Vol 333-335 ◽  
pp. 167-171
Author(s):  
Peng Qing Wang ◽  
Hong Jun Wang ◽  
He Peng Gao
Keyword(s):  
Personal Computer ◽  
Rotating Machinery ◽  
Point Method ◽  
Measuring System ◽  
Harmonic Suppression ◽  
Construction Site ◽  
Software Module ◽  
Accuracy Measurement ◽  
Sensor Arrangement ◽  
On Line

In order to measure the rotating machinery fault quickly and conveniently at a construction site, a new measuring system of rotating accuracy of spindle was developed according to three point method. With summarizing the principle of error separation technique based on three point method, the function, hardware construction and software module of this module were introduced. The problem of harmonic suppression is relieved by changing the sensor arrangement. The measuring system mainly consists of three eddy current sensors ,a acquisition card and a personal computer. After a few parameters were inputted, the rotation accuracy of calculation and display could be carried out automatically on line at a construction site.

On-Line Measuring System Using Isotope to Gauge Film Thickness

2012 ◽  
Vol 190-191 ◽  
pp. 1021-1028
Author(s):  
Li Zong Lin ◽  
Tao Wang ◽  
Ji Sheng Zhang
Keyword(s):  
Film Thickness ◽  
Pulse Number ◽  
Point Method ◽  
Measuring System ◽  
Error Source ◽  
Line System ◽  
On Line

On-line system was developed to gauge film thickness using isotope, by which the problem of difficulty in measuring wide film thickness was resolved. Two-point method, determining working curve of gauging system, was introduced, by which time spent on experiment could be decreased, and adaptability of working curve under different condition was improved. After analyzing measuring errors, emendation method for every error source was discussed .Method taking count of pulse number within a period of time was applied, by which measuring precision was improved, so this method can be used widely in other applications .This measuring system has obtained satisfying effect in measuring film thickness, and products can be bought in market .

High Precision Microcomputer Based Measuring System for Ecological Research

1986 ◽  
Vol 43 (10) ◽  
pp. 2044-2048 ◽  
Author(s):  
John C. Roff ◽  
Russell R. Hopcroft
Keyword(s):  
Data Storage ◽  
Personal Computer ◽  
Benthic Invertebrates ◽  
Repeated Measurements ◽  
Measuring System ◽  
Ecological Research ◽  
Image Measurement ◽  
Biological Interest ◽  
On Line ◽  
Multiple Measurements

A semiautomated measuring system is described which allows precise multiple measurements on organisms of biological interest. It consists of a microscope with drawing tube positioned next to a digitizing tablet which is interfaced to a personal computer; a TV camera and monitor are optional additions. Light from an LED fitted cursor on the digitizing pad is focused through the drawing tube and combined with the microscope image. Measurement signals are sent to the computer when the cursor button is depressed. Data storage, calculation, and display can be performed on-line as data are entered. Maximum precision of repeated measurements is ±0.04%; in routine use an accuracy of < ±0.25% is achieved. An example of its precision compared with a conventional eyepiece micrometer is given. The system has been used for measurement of a diversity of aquatic particles including phytoplankton, Zooplankton, fecal pellets, and stream benthic invertebrates at magnifications from 10 to 1250 power.

On-line alignment and astigmatism correction using a TV and personal computer

1993 ◽  
Vol 51 ◽  
pp. 202-203
Author(s):  
F. Hosokawa ◽  
Y. Kondo ◽  
T. Honda ◽  
Y. Ishida ◽  
M. Kersker
Keyword(s):  
High Resolution ◽  
Personal Computer ◽  
Block Diagram ◽  
Incident Beam ◽  
Ccd Camera ◽  
Alignment Procedure ◽  
Astigmatism Correction ◽  
Transmission Electron ◽  
Alignment System ◽  
On Line

High-resolution transmission electron microscopy must attain utmost accuracy in the alignment of incident beam direction and in astigmatism correction, and that, in the shortest possible time. As a method to eliminate this troublesome work, an automatic alignment system using the Slow-Scan CCD camera has been introduced recently. In this method, diffractograms of amorphous images are calculated and analyzed to detect misalignment and astigmatism automatically. In the present study, we also examined diffractogram analysis using a personal computer and digitized TV images, and found that TV images provided enough quality for the on-line alignment procedure of high-resolution work in TEM. Fig. 1 shows a block diagram of our system. The averaged image is digitized by a TV board and is transported to a computer memory, then a diffractogram is calculated using an FFT board, and the feedback parameters which are determined by diffractogram analysis are sent to the microscope(JEM- 2010) through the RS232C interface. The on-line correction system has the following three modes.

scholarly journals A Nonintrusive Rotor Blade Vibration Monitoring System

1996 ◽  
Author(s):  
Henry Jones
Keyword(s):  
Rotor Blade ◽  
Rotating Machinery ◽  
Vibration Monitoring ◽  
Static Deflection ◽  
Blade Vibration ◽  
Turbine Engine ◽  
Measurement Systems ◽  
Timing Data ◽  
On Line ◽  
Engine Rotor

A technique for measuring turbine engine rotor blade vibrations has been developed as an alternative to conventional strain-gage measurement systems. Light probes are mounted on the periphery of the engine rotor casing to sense the precise blade passing times of each blade in the row. The timing data are processed on-line to identify (1) individual blade vibration amplitudes and frequencies, (2) interblade phases, (3) system modal definitions, and (4) blade static deflection. This technique has been effectively applied to both turbine engine rotors and plant rotating machinery.

Research on the on-line dimensional accuracy measurement method of conical spun workpieces based on machine vision technology

Measurement ◽  
2019 ◽  
Vol 148 ◽  
pp. 106881 ◽  
Author(s):  
Gangfeng Xiao ◽  
Yongting Li ◽  
Qinxiang Xia ◽  
Xiuquan Cheng ◽  
Weiping Chen
Keyword(s):  
Machine Vision ◽  
Measurement Method ◽  
Dimensional Accuracy ◽  
Accuracy Measurement ◽  
On Line

Dynamic Inverse Model for Multi-Sensor Measurement System Based on Wavelet Neural Network

2012 ◽  
Vol 499 ◽  
pp. 335-339
Author(s):  
Dong Zhi Zhang ◽  
Bo Kai Xia ◽  
Kai Wang ◽  
Jun Tong ◽  
Nian Zhen Yang
Keyword(s):  
Neural Network ◽  
Measuring Method ◽  
Wavelet Neural Network ◽  
Inverse Model ◽  
Measuring System ◽  
Water Mixture ◽  
Accuracy Measurement ◽  
Sensing Technology ◽  
Dynamic Inverse ◽  
Digital Oilfield

As traditional measuring method based on dielectric coefficients shows cross-sensitivity for multi-factor in the measurement of oil/water mixture, it can not meet the requirements of digital oilfield construction. Therefore, this paper presents an inverse model of wavelet neural network (WNN) combining with multi-sensing technology for achieving high-accuracy measurement of water content in crude oil. The simulation and experimental results demonstrate that the proposed method is available to eliminate the cross-coupling effects of multi-factors. The method has higher measurement accuracy and stronger generalization than the model built by BP-NN, and opens a versatile approach in nonlinear error calibration for multi-factors measuring system.

Study on Measuring System of Automatic Image Alignment Refractive Index Based on New Mathematical Model

2014 ◽  
Vol 609-610 ◽  
pp. 1319-1323
Author(s):  
Qing Hua Yao ◽  
Miao Cao ◽  
Chang Liu
Keyword(s):  
Refractive Index ◽  
Optical Transmission ◽  
Optical Glass ◽  
Measuring System ◽  
Practical Significance ◽  
High Demand ◽  
Accuracy Measurement ◽  
General Instrument ◽  
Measurement Repeatability ◽  
High Accuracy Measurement

With the development of measuring technology,the measuring accuracy of optical glass refractive index of the increasingly high demand,V prism refractometers is major general instrument for measuring the refractive index of optical glass,not only the simple device,convenient measurement,and this method has high precision performance,however,the accuracy is only attained ,which in the regulation of national metrology verification and the introduction of V prism refractometers in the literature,the classic formula calculation principle formula error caused by refractive index has more than .Based on the mechanical structure and optical transmission to improve the original V prism refractometers the refractive index of air,by considering the influence on measurement precision of V prism refractometer,to mathematical modeling of V prism refractometer the principle formula,V can be measured refractive prism refractometer rate accuracy increased to ,measurement repeatability less than ,has important practical significance for realizing high accuracy measurement of the refractive index of optical glass.

Development of a measuring system for on-line in situ monitoring of composite materials manufacturing

2016 ◽  
Vol 90 ◽  
pp. 760-770 ◽  
Author(s):  
R. Polanský ◽  
J. Pihera ◽  
J. Komárek ◽  
R. Pavlica ◽  
P. Prosr ◽  
...  
Keyword(s):  
Composite Materials ◽  
In Situ Monitoring ◽  
Measuring System ◽  
On Line
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